Network partition tolerance in a high available centralized vcs implementation

ABSTRACT

Implementations provide a database lock mechanism used to prevent concurrent writes to service on network partition scenarios associated with a version control system. The database lock mechanism may be provided on per repository basis to ensure both nodes are working and maintaining data consistency, even when they are not connected when interruptions in network communication disrupts the intercommunication between nodes. In other implementations, the disclosed locking mechanism is configured to ensure and perform write and synchronization operations on isolated nodes, regardless of miss-communication between the nodes.

CROSS REFERENCES TO RELATED APPLICATIONS

This application claims priority from U.S. Provisional PatentApplication Ser. No. 62/395,232, entitled NETWORK PARTITION TOLERANCE INA HIGH AVAILABLE CENTRALIZED VCS IMPLEMENTATION, filed on Sep. 15, 2016(ORACP0178P), and U.S. Provisional Patent Application Ser. No.62/395,341, entitled SYSTEM FOR PROCESS CLOUD SERVICE, filed on Sep. 15,2016 (ORACP0192P), which are hereby incorporated by reference as if setforth in full in this application for all purposes.

BACKGROUND

The following relates to data lock mechanisms used in network systems.More specifically the following relates to lock mechanisms used in highavailability networks.

Software versioning and revision control system, such as APACHESubversion (SVN), are file-system based source control systems used tomaintain current and historical versions of data files such as sourcecode, web pages, documentation, etc. Backup mechanisms are used tobackup the SVN repository into the database and distribute the SVNrepository across nodes in the cluster. However, since currentversioning and revision control system programs rely on fixed quorumpolicies, such mechanisms are often ineffective in maintainingsynchronous versions of distributed node clusters.

Adding network partitions increases the complexity as such currentversioning and revision control system programs often not capable ofeffectively working with node clusters distributed across partitions,resulting in potential inconsistencies in the repository. The problem isfurther exacerbated with multiple nodes working in parallel andprocessing new information on the same assets, especially in highavailability environments, where providing the latest info and dataconsistency is often a top priority.

In the case of a 2-node configuration, if there is a network partition(i.e. both nodes are active but cannot see each other) then each of thenodes is able to write, regardless on what's happening on the othernode. When concurrent writes are successful the history of therepositories often diverges. Unfortunately, when the repositoriesdiverge, merging the repositories using current versioning and revisioncontrol system programs often becomes a highly complex problem thatusually involves human interaction, which because of the complexity anddifficulty in determining what changes between the divergentrepositories should and should not be merged, may break the space when acorruption occurs rendering services unavailable.

Therefore, a new and improved method and system for locking data innetwork systems is desired.

SUMMARY

Implementations described herein provide a database lock mechanismconfigured to prevent concurrent writes to service on network partitionscenarios associated with a version control system. In someimplementations, the lock mechanism may be provided on per repositorybasis to ensure nodes associated with the repository are working andmaintaining data consistency even when they are not connected wheninterruptions in network communication occur that disruptintercommunication between nodes. In other implementations, thedisclosed database lock mechanism is configured to perform writeoperations and sync functions on isolated nodes, regardless ofmiss-communication between the nodes.

An implementation provides a computer implemented method for receivingat a first node of a system containing a plurality of nodes, an actionfor changes to a file that is common to at least a second node andstored in a database locked from allowing changes to the file by adatabase lock, wherein the first node and the second node are isolatedby a network partition and analyzing attributes of the action todetermine whether the action received is required to update the file. Inresponse to determining that the action is required to update the file,determining from a data repository whether a database update action isset as unlocked. If the database update action is set as unlocked thenquerying the data repository associated with the first node to determinerevision information pertaining to the file and determining from therevision information whether the file is a latest revision associatedwith required changes to the file. If the file is the latest revision,then unlocking the data repository and committing the changes to thedata repository. In response to committing the changes to the datarepository, updating the revision of the file in the data repositorybased on the changes, and in response to committing the changes to thedata repository and updating the revision of the data repository,releasing the database lock and updating the file with the changes.

In one implementation, to avoid corruption between repositories thatoften maintain their own revision information, a database lock mechanismemploys a table configured to maintain locking information and correctrevisions for one or more repositories. As such, to prevent repositorycorruption in partitioned systems, the database lock mechanism inconjunction with the table may be deployed as an interface layerconfigured to act as a safeguard on top of, or as part of, otherdatabase tables and functions, such that only one node in a cluster willbe allowed to publish a latest revision.

In an implementation, to prevent inconsistencies that can occur whennetwork partitions are employed, a lock mechanism compares a local SVNrepository on a file system (FS) to its version in the DB and isupdated. In other implementations, an option is provided to synchronizeSVN commits with DB updates or asynchronously update the repository inthe DB.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a high level illustration of a database lock mechanism.

FIG. 2 is an overview of a process asset manager instantiated in a cloudservice.

FIG. 3 is a flow diagram for an implementation of a database lockmechanism.

FIG. 4 is a high level flow diagram of a mechanism to prevent a nodeopening an editing session.

FIG. 5 is a high level representation of a disaster recovery tool.

FIG. 6 is a flow diagram of an example method adapted for use withimplementations, and variations thereof, illustrated in FIGS. 1-5.

FIG. 7 is a high-level block diagram of an exemplary computer andcommunication system.

A further understanding of the nature and the advantages of particularembodiments disclosed herein may be realized by reference of theremaining portions of the specification and the attached drawings.

DETAILED DESCRIPTION OF EMBODIMENTS

FIG. 1 is a high-level block diagram of an exemplary computing system100 for providing a database lock mechanism. Computing system 100 may beany computing system, such as an enterprise computing environment,client-server system, and the like. Computing system 100 includes datasystem 110 configured to process data received from a user interface114, such as a keyboard, mouse, etc.

Note that the computing system 100 presents a particular exampleimplementation, where computer code for implementing embodiments may beimplemented, at least in part, on a server. However, embodiments are notlimited thereto. For example, a client-side software application mayimplement data system 110, or portions thereof, in accordance with thepresent teachings without requiring communications between theclient-side software application and a server.

In one exemplary implementation, data system 110 is connected to display130 configured to display data 140, for example, to a user thereof.Display 130 may be a passive or an active display, adapted to allow auser to view and interact with graphical data 140 displayed thereon, viauser interface 114. In other configurations, display 130 may be a touchscreen display responsive to touches, gestures, swipes, and the like foruse in interacting with and manipulating data 140 by a user thereof.Gestures may include single gestures, multi-touch gestures, and othercombinations of gestures and user inputs adapted to allow a user toconvert, model, generate, deploy, and maintain data 140.

In other implementations, computing system 100 may include a data sourcesuch as database 120. Database 120 may be connected to the data system110 directly or indirectly, for example via a network connection, andmay be implemented as a non-transitory data structure stored on a localmemory device, such as a hard drive, Solid State Drive (SSD), flashmemory, and the like, or may be stored as a part of a Cloud network, asfurther described herein.

Database 120 may contain data sets 122. Data sets 122 may include dataas described herein. Data sets 122 may also include data pertaining todata attributes, data hierarchy, nodal positions, values, summations,types of charts of visualizations, algorithms, code (e.g., Javascript,JSON, etc.), source, security, hashes, XML, and the like. In addition,data sets 122 may also contain other data, data elements, andinformation such as metadata, labels, development-time information,run-time information, configuration information, API, interfacecomponent information, library information, pointers, and the like.

Data system 110 may include user interface module 112, database lockengine 116, and rendering engine 118. User interface module 112 may beconfigured to receive and process data signals and information receivedfrom user interface 114. For example, user interface module 112 may beadapted to receive and process data from user input associated with data140 for processing via data system 110.

In an exemplary implementation, database lock engine 116 may be adaptedto receive data from user interface 114 and/or database 120 forprocessing thereof. In one configuration, database lock engine 116 is asoftware engine configured to receive and process input data from a userthereof pertaining to data 140 from user interface module 114 and/ordatabase 120 in order to generate a database locking mechanism, checklocal SVN repositories instantiated on a file system against its versionin the database, update the SVN repository on the files system, provideoptions to synchronize SVN commits with database or to asynchronouslyupdate a repository in the database, etc.

Database lock engine 116 in other implementations may be configured as adata analysis tool. Such analysis functions may include determining theattributes associated with the data, whether commits are or are notsuccessful, whether actions are required, not required, orinformational, determining the type of data, determining the values ofthe data, determining the relationships to other data, interpretingmetadata associated with the data, and the like. For example, databaselock engine 116 may be configured to receive and analyze data sets 122to determine user interface configuration, data processing instructions,data attributes, data hierarchy, nodes, nodal positions within thehierarchy, values, summations, algorithms, source, security, hashes, andthe like, associated with data sets 122.

Database lock engine 116 may receive existing data sets 122 fromdatabase 120 for processing thereof. Such data sets 122 may include andrepresent a composite of separate data sets 122 and data elementspertaining to, for example, organizational data, which may includeemployment data, salary data, personnel data, and the like. In addition,data sets 122 may include other types of data, data elements, andinformation such as contact data, sales data, production data,scientific data, financial data, medical data, census data, and thelike.

Rendering engine 118 may be configured to receive configuration datapertaining to data 140, associated data sets 122, and other dataassociated with data 140 such as user interface components, icons, userpointing device signals, and the like, used to render data 140 ondisplay 130. In one exemplary implementation, rendering engine 118 maybe configured to render 2D and 3D graphical models and simulations toallow a user to obtain more information about data sets 122. In oneimplementation, upon receiving instruction from a user, for example,through user interface 114, rendering engine 118 may be configured togenerate a real-time display of interactive changes being made to data140 by a user thereof.

FIG. 2 is an overview of a process asset manager (PAM) 200 instantiatedin a database such as database 120, process cloud service (PCS), and thelike. In one implementation, PAM 200 includes PCS POD 202A and PCS POD202B configured to take input from a program 208. As illustrated, PCSPOD 202 includes program 208A and PCS POD 204 includes program 208B.Program 208 may be any program that enables any user interface, such asa WebCenter portal, to be customized or personalized after it has beendeployed and is in use. For example, program 208 may be ORACLE COMPOSERwhich is configured to run in all modern browsers and provides a rich,dynamic way to edit JSF application and portal pages by selectinginformation and components from Business Dictionaries, ResourceCatalogues, and the like.

Here, a user A, inputs data to PCS POD 202A. For example, user A couldbe a user working on a business process management (BPM) projectresiding on BPM server 210A. In this implementation, the database lockengine 116 may be configured such that the user has the ability to saveprojects so that they don't get lost in an editing session (for examplewhen user A leaves the program to do another task, and the http sessionexpires before the user returns).

In some implementations, a “Save” operation is used to save changes madeby user A. As part of the save operation, project files are written to aprogram such as program 212 helps to keep data structures in nodesacross the partition in sync.

Similarly, user B, inputs data to PCS POD 202B. For example, user Bcould be a user working on a BPM project residing on BPM server 210B. Inthis implementation, the database lock engine 116 may be configured suchthat the user has the ability to save projects so that they don't getlost in an editing session (for example when user B goes to lunch andthe http session expires before he returns).

Program 212 for BPM project files may be configured as a cache, such asa write-behind cache. When the user, (e.g. user A or B) saves the BPMproject in program 212, after the project is saved to program 212 it maybe persisted in a table 216, for example, table BPM_BAC_SESSIONinstantiated in a database 120, such as PCS POD database 214.

When the user has finished creating the BPM project (or whenever theuser intends to commit the project), the user may commit his work to PAM200 so that it becomes available for other users to edit. As part of thecommit operation, the files stored in table 216, e.g., BPM_BAC_SESSION,may be considered and committed to the SVN repository 206 in thedatabase 214. After the SVN repository 206 is updated the data may beremoved from table 216.

When SVN repository 206 has been updated through for example, a commitoperation, database lock engine 116 may create a backup of some or theentire repository in the database 214. For example, the backup may bepersisted in database table 218, e.g., BPM_BAC_REPOSITORY_BACKUP.Database lock engine 116, may also create database table 220, e.g.,BPM_BAC_REPOSITORY_LOCK configured to store data such as the repositoryuuid, latest revision, etc. In one configuration, table 220 may beconsulted multiples times during the locking process as describedherein, and may be used as a data source of the true revision of arepository. Additionally, a metadata table 222, e.g.,BPM_BAC_METADATA_STORE, may be created in order to store basicinformation about a server configuration such as topology, address,ports, etc.

FIG. 3 is a flow diagram for an implementation of database lockmechanism 116. In one implementation, database lock engine 116 may beimplemented as an instantiation in database 120 to avoid the issue ofnetwork partitions. In some scenarios, when the application has noconnection to the database 120 that changes to the database are isolatedonly to the database as illustrated in FIG. 3. So in the case of anetwork partition, database lock engine 116 guarantees that onlyaccessible nodes in the cluster would be able to update the repository.

For example, as shown in FIG. 3, Node 301A, and Node 301B are separatedby a network partition 302. User A of node 301A and user B of node 301Bare able to operate on the same database structure using a databasesynchronizing program 212, such as COHERENCE, to keep them in sync.Changes, for example, are published at 212 for each user A and B. Suchchanges are stored in repository 206A and 206B accordingly. Databaselock engine 116 locks database 120 at each action, and if the changesare accepted, database lock engine 116 unlocks database 120 to allowchanges to be committed.

Thus, database lock engine 116 may be configured to lock actions, suchas commits, from occurring that are associated with the SVN repository206A or 206B. In this configuration, database lock engine 116 preventsinconsistencies due to errors caused by or associated with networkpartition 302, provides a mechanism to check local SVN repositories 206Aand/or 206B on filesystem against its version in the database 122,updates the SVN repository on 214, and provides an option to synchronizeactions such as SVN commits with database update of repository or toasynchronously update the repository in the database 122. As such, bycontrolling which changes are being committed and saved, database lockengine 116 improves processor function and network efficiency bypreventing program 212 from storing unnecessary or redundant changes.

In order to further preserve processing function associated with localdata processing and/or remote processing over the network, database lockengine 116 may be configured to analyze the changes in real time todetermine whether to accept, reject, or ignore changes to be committedrelative to each user, e.g., user A and user B, working on the file. Inthis configuration, database lock engine 116 analyzes the type of changeto determine whether a change to be committed is required, is notrequired, or is informational, i.e. where it does not affect thecontents of the file.

In some implementations, database lock engine 116 may be configured todetermine whether to save such changes relative to a variable level. Forexample, database lock engine 116 may determine that all or some of therequired changes should be saved and synchronized, but all or somechanges that are not required and informational may be rejected, some orall required changes and/or changes that are not required should besaved, but changes that are informational should be ignored, andcombinations thereof.

For example, consider the caser where user A is using a program such asCOMPOSER on node 301A and sets the program to auto save and/orperiodically saves the file regardless of whether changes have been madeto the underlying data. During this mode, database lock engine 116 maysynchronize substantive changes, e.g., actual changes to a file,document, database entry, etc., synchronize or reject innocuous changes,e.g., changes to the document that do not change its substantivecontent, or synchronize or reject changes that do not affect thedocument which may be informational, such as a time stamp on the file.

In one scenario, database lock engine 116 creates a lock table asdescribed herein which is stored, for example, in table 220. The locktable is configured to maintain locking information about one or moreSVN repositories, such as SVN repositories 206A or 206B.

FIG. 4 is a high level flow diagram of a method 400 employing databaselock engine 116 configured to prevent a node from opening an editingsession. As further illustrated in FIG. 4, in some implementations, asimplified version of the algorithm may be:

1. IF (myRev>=BPM_BAC_REPO_LOCK.LATEST_REVISION) THENBPM_PAM.request_lock(BPM_BAC_REPO_LOCK.REPOSITORY_UUID)

2. Commit changes to SVN

3. IF (2 was successful) Update

BPM_BAC_REPO_LOCK.LATEST_REVISION SETBPM_BAC_REPO_LOCK.LATEST_REVISION=myRevision WHEREBPM_BAC_REPO_LOCK.REPOSITORY_UUID=myRepositoryId

4. BPM_PAM.release_lock(BPM_BAC_REPO_LOCK.REPOSITORY_UUID)

At 401, when an action, such as edit, is initiated, method 400 at 402checks whether the action is locked, for example, by interrogatingdatabase 120. If yes, then method 400 returns to 401. However, if not,method 400 at 404 checks to see of the action is associated with thelatest revision of the BPM project, for example, by querying lock table220 instantiated in database 120. If no, then method 400 returns to 401.If yes, then at 406 method 400 requests lock.

In some implementations at 404, method 400 may query a plurality ofattributes of the lock table to determine whether the revision of theproject is the latest revision. For example, database lock engine 116may analyze a plurality or set of attributes and data such as versionnumbers, types of changes, date stamps, file sizes, read/write history,and the like to discern a “latest” or desired revision. As such,database lock engine 116 may rely on a more comprehensive set of data todetermine project revision than, for example, a single data point suchas a revision number.

AT 408, method 400 stores actions, such as commit actions, to SVNrepository 410. At 412, if the actions are successfully committed to SVNrepository 410, the lock is released so that database 120 may beupdated. If no, the lock release request is aborted.

Thus, database lock engine 116 acts as a safe guard ensuring that onlyone node will be able to publish the latest revision (e.g.,LATEST_REVISION+1) and hence will prevent repository corruption.

FIG. 5 is a high-level illustration of a database recovery tool 500.Database recovery tool 500 includes a recovery disaster tool 502 that isconfigured to ensure that if a failure occurs then a user, such as anadministrator, may be allowed to use the database recovery disaster tool502 to initiate a service 504 pertaining to a transaction associatedwith, for example, PAM 200. Service 504 may be configured to selectsupdates from lock table 220 instantiated in database 120, and initiatedatabase lock engine 116 to apply a lock, e.g., Database ManagementSystem Lock (DBMS_LOCK). For example, recovery disaster tool 504 may beconfigured to perform functions such as releasing a lock and updatingproject repositories to the latest revision, abort a project repositoryupdate by releasing a lock while not updating the latest revision of theproject repository, determining whether the project is locked or notlocked, determining the latest project revision, and the like.

FIG. 6 is a flow diagram of an example method adapted for use withimplementations, and variations thereof, illustrated in FIGS. 1-5.Method 600 is entered into for example at 601 when data system 110 isinitiated. At 602. Method 600 determines is database lock engine 116 hasbeen initiated. If no, method 600 returns to 601. If yes, then method600 proceeds to 604 to analyze user actions for each node separated by anetwork partition. At 606, local repository information related to eachnode is determined. At 608, the SVN repository for each node is updated.If at 610, a sync option is selected, then updates at 608 aresynchronously updated. If at 610, a sync option is not selected thenmethod proceeds to 614 to update the repositories asynchronously. At616, if the update is done, method 600 ends at 618, if not, method 600returns to 601.

FIG. 7 is a block diagram of an exemplary computer system 700 for usewith implementations described in FIGS. 1-5. Computer system 700 ismerely illustrative and not intended to limit the scope of the claims.One of ordinary skill in the art would recognize other variations,modifications, and alternatives. For example, computer system 700 may beimplemented in a distributed client-server configuration having one ormore client devices in communication with one or more server systems.

In one exemplary implementation, computer system 700 includes a displaydevice such as a monitor 710, computer 720, a data entry device 730 suchas a keyboard, touch device, and the like, a user input device 740, anetwork communication interface 750, and the like. User input device 740is typically embodied as a computer mouse, a trackball, a track pad,wireless remote, tablet, touch screen, and the like. Moreover, userinput device 740 typically allows a user to select and operate objects,icons, text, characters, and the like that appear, for example, on themonitor 710.

Network interface 750 typically includes an Ethernet card, a modem(telephone, satellite, cable, ISDN), (asynchronous) digital subscriberline (DSL) unit, and the like. Further, network interface 750 may bephysically integrated on the motherboard of computer 720, may be asoftware program, such as soft DSL, or the like.

Computer system 700 may also include software that enablescommunications over communication network 752 such as the HTTP, TCP/IP,RTP/RTSP, protocols, wireless application protocol (WAP), IEEE 802.11protocols, and the like. In addition to and/or alternatively, othercommunications software and transfer protocols may also be used, forexample IPX, UDP or the like.

Communication network 752 may include a local area network, a wide areanetwork, a wireless network, an Intranet, the Internet, a privatenetwork, a public network, a switched network, or any other suitablecommunication network, such as for example Cloud networks. Communicationnetwork 752 may include many interconnected computer systems and anysuitable communication links such as hardwire links, optical links,satellite or other wireless communications links such as BLUETOOTH,WIFI, wave propagation links, or any other suitable mechanisms forcommunication of information. For example, communication network 752 maycommunicate to one or more mobile wireless devices 756A-N, such asmobile phones, tablets, and the like, via a base station such aswireless transceiver 754.

Computer 720 typically includes familiar computer components such as oneor more processors 760, and memory storage devices, such as a memory770, e.g., random access memory (RAM), storage media 780, and system bus790 interconnecting the above components. In one embodiment, computer720 is a PC compatible computer having multiple microprocessors,graphics processing units (GPU), and the like. While a computer isshown, it will be readily apparent to one of ordinary skill in the artthat many other hardware and software configurations are suitable foruse with the present invention.

Memory 770 and Storage media 780 are examples of non-transitory tangiblemedia for storage of data, audio/video files, computer programs, and thelike. Other types of tangible media include disk drives, solid-statedrives, floppy disks, optical storage media such as CD-ROMS and barcodes, semiconductor memories such as flash drives, flash memories,read-only-memories (ROMS), battery-backed volatile memories, networkedstorage devices, Cloud storage, and the like.

Although the description has been described with respect to particularembodiments thereof, these particular embodiments are merelyillustrative, and not restrictive. Further details of embodiments may befound in the attached documents provided with this application.

Any suitable programming language can be used to implement the routinesof particular embodiments including C, C++, Java, assembly language,etc. Different programming techniques can be employed such as proceduralor object oriented. The routines can execute on a single processingdevice or multiple processors. Although the steps, operations, orcomputations may be presented in a specific order, this order may bechanged in different particular embodiments. In some particularembodiments, multiple steps shown as sequential in this specificationcan be performed at the same time.

Particular embodiments may be implemented in a computer-readable storagemedium for use by or in connection with the instruction executionsystem, apparatus, system, or device. Particular embodiments can beimplemented in the form of control logic in software or hardware or acombination of both. The control logic, when executed by one or moreprocessors, may be operable to perform that which is described inparticular embodiments.

Particular embodiments may be implemented by using a programmed generalpurpose digital computer, by using application specific integratedcircuits, programmable logic devices, field programmable gate arrays,optical, chemical, biological, quantum or nanoengineered systems,components and mechanisms may be used. In general, the functions ofparticular embodiments can be achieved by any means as is known in theart. Distributed, networked systems, components, and/or circuits can beused. Communication, or transfer, of data may be wired, wireless, or byany other means.

It will also be appreciated that one or more of the elements depicted inthe drawings/figures can also be implemented in a more separated orintegrated manner, or even removed or rendered as inoperable in certaincases, as is useful in accordance with a particular application. It isalso within the spirit and scope to implement a program or code that canbe stored in a machine-readable medium to permit a computer to performany of the methods described above.

As used in the description herein and throughout the claims that follow,“a”, “an”, and “the” includes plural references unless the contextclearly dictates otherwise. Also, as used in the description herein andthroughout the claims that follow, the meaning of “in” includes “in” and“on” unless the context clearly dictates otherwise.

Thus, while particular embodiments have been described herein, latitudesof modification, various changes, and substitutions are intended in theforegoing disclosures, and it will be appreciated that in some instancessome features of particular embodiments will be employed without acorresponding use of other features without departing from the scope andspirit as set forth. Therefore, many modifications may be made to adapta particular situation or material to the essential scope and spirit.

We claim:
 1. A non-transitory computer readable medium including one ormore instructions executable by one or more processors for: receiving ata first node of a system containing a plurality of nodes, an action forchanges to a file that is common to at least a second node and stored ina database locked from allowing changes to the file by a database lock,wherein the first node and the second node are isolated by a networkpartition; analyzing attributes of the action to determine whether theaction received is required to update the file; in response todetermining that the action is required to update the file, determiningfrom a data repository whether a database update action is set asunlocked; if the database update action is set as unlocked then queryingthe data repository associated with the first node to determine revisioninformation pertaining to the file; determining from the revisioninformation whether the file is a latest revision associated withrequired changes to the file; if the file is the latest revision, thenunlocking the data repository; committing the changes to the datarepository; in response to committing the changes to the datarepository, updating the revision of the file in the data repositorybased on the changes; and in response to committing the changes to thedata repository and updating the revision of the data repository,releasing the database lock and updating the file with the changes. 2.The computer readable medium of claim 1, wherein the data repository isa SVN repository.
 3. The computer readable medium of claim 1, whereinthe data repository comprises a local repository associated with thefirst node.
 4. The computer readable medium of claim 1, whereindetermining from a synchronization attribute stored in the datarepository a data synchronization type used to update the database. 5.The computer readable medium of claim 4, further comprising determiningfrom data synchronization type whether changes to the first node andchanges to the second node are synchronously updated in the database. 6.The computer readable medium of claim 4, further comprising determiningfrom the data synchronization type whether changes to the first node andchanges to the second node are asynchronously updated in the database.7. The computer readable medium of claim 1, wherein attributes of theaction comprise other attributes indicating the action received is notrequired to update the file.
 8. The computer readable medium of claim 1,wherein attributes of the action comprise other attributes indicatingthe action received is related to changes to file information.
 9. Thecomputer readable medium of claim 1, wherein analyzing attributes of theaction further comprises determining whether changes to the file wouldresult in no change to file contents.
 10. The computer readable mediumof claim 1, wherein determining from the revision information whetherthe file is the latest revision further comprises analyzing a pluralityof data stored in the data repository.
 11. A computer implemented methodcomprising: receiving at a first node of a system containing a pluralityof nodes, an action for changes to a file that is common to at least asecond node and stored in a database locked from allowing changes to thefile by a database lock, wherein the first node and the second node areisolated by a network partition; analyzing attributes of the action todetermine whether the action received is required to update the file; inresponse to determining that the action is required to update the file,determining from a data repository whether a database update action isset as unlocked; if the database update action is set as unlocked thenquerying the data repository associated with the first node to determinerevision information pertaining to the file; determining from therevision information whether the file is a latest revision associatedwith required changes to the file; if the file is the latest revision,then unlocking the data repository; committing the changes to the datarepository; in response to committing the changes to the datarepository, updating the revision of the file in the data repositorybased on the changes; and in response to committing the changes to thedata repository and updating the revision of the data repository,releasing the database lock and updating the file with the changes. 12.The method of claim 11, wherein the data repository is a SVN repository.13. The method of claim 11, wherein the data repository comprises alocal repository associated with the first node.
 14. The method of claim11, wherein determining from a synchronization attribute stored in thedata repository a data synchronization type used to update the database.15. The method of claim 14, further comprising determining from datasynchronization type whether changes to the first node and changes tothe second node are synchronously updated in the database.
 16. Themethod of claim 14, further comprising determining from the datasynchronization type whether changes to the first node and changes tothe second node are asynchronously updated in the database.
 17. Themethod of claim 11, wherein attributes of the action comprise otherattributes indicating the action received is not required to update thefile.
 18. The method of claim 11, wherein attributes of the actioncomprise other attributes indicating the action received is related tochanges to file information.
 19. The method of claim 11, whereinanalyzing attributes of the action further comprises determining whetherchanges to the file would result in no change to file contents.
 20. Anapparatus for managing database data updates in a computing environmentbetween partitioned systems, the computing environment comprising one ormore computing devices in communication with a software application thatexecutes software configured to provide information accessible to theone or more computing devices, a computing device of the one or morecomputing devices configured to: receive at a first node of a systemcontaining a plurality of nodes, an action for changes to a file that iscommon to at least a second node and stored in a database locked fromallowing changes to the file by a database lock, wherein the first nodeand the second node are isolated by a network partition; analyzeattributes of the action to determine whether the action received isrequired to update the file; in response to determining that the actionis required to update the file, determine from a data repository whethera database update action is set as unlocked; if the database updateaction is set as unlocked then querying the data repository associatedwith the first node to determine revision information pertaining to thefile; determine from the revision information whether the file is alatest revision associated with required changes to the file; if thefile is the latest revision, then unlock the data repository; commit thechanges to the data repository; in response to committing the changes tothe data repository, update the revision of the file in the datarepository based on the changes; and in response to commit the changesto the data repository and update the revision of the data repository,release the database lock and update the file with the changes.